[FreeBSD? BUG]: t1304-default-acl.sh fails on FreeBSD 8.1-STABLE

t/t1304-default-acl.sh fails on FreeBSD, seemingly because setfacl on FreeBSD doesn't have a meaningful return code:

    $ setfacl -m u:root:rwx . ; echo $?
    setfacl: .: acl_get_file() failed: Operation not supported
    0

But on Linux:

    $ setfacl -m u:root:rwx . ; echo $?
    setfacl: .: Operation not supported
    1

The Solaris setfacl also behaves.

The FreeBSD manpage says this:

    EXIT STATUS
         The setfacl utility exits 0 on success, and >0 if an error occurs.

Anyone here know more about FreeBSD to shed light on this?